Question

“Mobile phones killed our man,”screamed one headline last year. Also came claims that an unpublished study had found that mobile phones cause memory loss. And a British newspaper devoted its front page to a picture supposedly showing how mobile phones heat the brain.

For anyone who uses a moblie phone, these are worring times. But speak to the scientists whose work is the focus of these scared and you will hear a different story.

What we do have, however, are some results suggesting that mobile phones’emission(散發(fā))have a variety of strange effects on living tissue that can’t be explained by the general radiation biology. And it’s only when the questions raised by these experients are answered that we’ll be able to say for sure what moblie phones might be doing to the brain.

One of the odd effects comes from the now famous”merrory loss” study. Alan Preece and his colleagues at the University of Bristol placed a device that imitated the microwave emission of mobile phones to the left ear of volunteers. The volunteers were all goood at recalling words and pictures they had been shown on a computer screen. Preece says he still can’t comment on the effects of using a mobile phone for years on end. But he rules out the suggestion that mobile phones have an immediate effect on our cognitive(感知的)abilities.”I’m pretty sure there is no effect on short-term memory,” he says.

Another expert, Tatterasll, remarked that his latest findings have removed fears about memory loss. One result, for instance, suggests that nerve cell synapses(神經元突觸) exposed to microwaves become more----rather than less-----receptive to under-going changes linked to the memory formation.

It would be an even happier outcome if microwave turned out to be good for you. It sounds crazy, but a couple of years ago a team led by William Adey at the Veterans Affairs Medical Center in California, found that mice exposed to microwave for two hours a day were less likely to develop brain tumours(腫瘤) when given a cancer-causing chemical.

So should we forget about mobile phone radiation causing brain tumours and scrambling our minds?

“If it doesn’t certainly cause cancer in animals and cells, then it probably isn’t going to cause cancer in humans,”says William. And while there’s still no absolute evidence that mobile phone does mangle your memories or give your cancer, the consensus is:Don’t panic.

 

72. What worries people who use mobile phones?

     A. Mobile phones will kill them            B.Mobile phones cause memory loss

     C.Mobile phones heat the brain            D.All above is right

73. What is the attitude of Preece on the suggestion that mobile phones have an immediate effect on our congnitive abilities?

A.Positive      B. Negative       C.Unknown         D.Wait and see

74.The underlined word”consensus” in the last paragraph most probably means”______”

A. agreement     B.disagreement       C.possibility        D.impossibility

75.From the third paragraph from the bottom, we can infer that_____.

A.being exposed to microwaves for two hours can result in killing you

B.being exposed to microwaves for two hours is likely to develop brain tumours

C.being exposed to microwaves for two hours is unlikely to develop brain tumours

D.being exposed to microwaves for two hours will cause your loss of memory for ever

Answer 1

DBAC